Everything in Vegas is expensive. If you haven't figured this out yet you will soon.
I came to this location to get some cash from the Chase ATM. Not only do they have this but they also have the tap to pay at checkout. They have self checkout for about 8 total customers 4 on each side as well as plenty of clerk serviced checkouts. Water and Gatorade are expensive but necessary in the hot and dry dessert of Las Vegas. Be sure to hydrate early and often.